Dampening Mechanism for a Micro Speaker

Abstract

A speaker comprises a diaphragm, a drive assembly for producing movement of said diaphragm responsive to an applied electrical signal to generate audible sounds, and at least one mechanical dampener applied to a surface of the speaker to dissipate energy when the dampener is impacted by said diaphragm.

1 . A speaker comprising:
 a diaphragm;   a drive assembly for producing movement of said diaphragm responsive to an applied electrical signal to generate audible sounds; and   at least one mechanical dampener arranged to be contacted by the diaphragm at the outer limits of the diaphragm excursion to dampen the impact of said diaphragm and to reduce sound distortion.   
     
     
         2 . The speaker of  claim 1  further comprising a housing, wherein a first dampener is applied to a surface of said housing. 
     
     
         3 . The speaker of  claim 2  wherein said housing includes a front plate, said dampener being applied to an inner surface of said front plate. 
     
     
         4 . The speaker of  claim 3  wherein said dampener includes one or more apertures to allow to passage of air through the dampener. 
     
     
         5 . The speaker of  claim 3  wherein the drive assembly comprises an electromagnetic coil attached to said diaphragm and a magnet, wherein a second dampener is applied to a surface of said magnet. 
     
     
         6 . The speaker of  claim 5  wherein said magnet includes a central opening to allow air to enter into and exit from said housing, and wherein said dampener at least partially covers said opening to restrict air flow through said central opening in said magnet. 
     
     
         7 . The speaker of  claim 1  wherein the drive assembly comprises an electromagnetic coil attached to said diaphragm and a magnet, wherein a first dampener is applied to a surface of said magnet. 
     
     
         8 . The speaker of  claim 7  wherein said magnet includes a central opening, and wherein said dampener at least partially covers said central opening in said magnet to restrict air flow through said central opening in said magnet.